×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Thread + torque + high temp + creep = seize?

Thread + torque + high temp + creep = seize?

Thread + torque + high temp + creep = seize?

(OP)
Just wondering if you have threads that are in a continuous service temperature of 1500-2000F environment that are either made of 1144 steel or 304 stainless with 1 1/4-12 threads with an applied torque of about 50-60ftlbs if after time the threads of both materials will deform/creep from the axial load created from the torque

We are having trouble with threads seizing in the field under those temperatures. I am wondering how threads will handle temps like these... what are your experiences?

I also am looking for some way to calculate the stress in ksi in the pieces made by applying the torque... can someone help me?

The pieces are actually the outside of a tube threaded with the 1 1/4-12 threads (class 1) and the inside of a cap nut that screws on top also class 1 threads...

Thanks a lot for any advice...  

RE: Thread + torque + high temp + creep = seize?

(OP)
oh and the torque is applied during assembly... not continuous

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources